Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
"""
Created on Sun Dec  2 19:03:57 2018

@author: maezawa
"""

prime_numbers=[2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 317, 331, 337, 347, 349, 353, 359, 367, 373, 379, 383, 389, 397, 401, 409, 419, 421, 431, 433, 439, 443, 449, 457, 461, 463, 467, 479, 487, 491, 499, 503, 509, 521, 523, 541, 547, 557, 563, 569, 571, 577, 587, 593, 599, 601, 607, 613, 617, 619, 631, 641, 643, 647, 653, 659, 661, 673, 677, 683, 691, 701, 709, 719, 727, 733, 739, 743, 751, 757, 761, 769, 773, 787, 797, 809, 811, 821, 823, 827, 829, 839, 853, 857, 859, 863, 877, 881, 883, 887, 907, 911, 919, 929, 937, 941, 947, 953, 967, 971, 977, 983, 991, 997, 1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063, 1069, 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153, 1163, 1171, 1181, 1187, 1193, 1201, 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93941, 93949, 93967, 93971, 93979, 93983, 93997, 94007, 94009, 94033, 94049, 94057, 94063, 94079, 94099, 94109, 94111, 94117, 94121, 94151, 94153, 94169, 94201, 94207, 94219, 94229, 94253, 94261, 94273, 94291, 94307, 94309, 94321, 94327, 94331, 94343, 94349, 94351, 94379, 94397, 94399, 94421, 94427, 94433, 94439, 94441, 94447, 94463, 94477, 94483, 94513, 94529, 94531, 94541, 94543, 94547, 94559, 94561, 94573, 94583, 94597, 94603, 94613, 94621, 94649, 94651, 94687, 94693, 94709, 94723, 94727, 94747, 94771, 94777, 94781, 94789, 94793, 94811, 94819, 94823, 94837, 94841, 94847, 94849, 94873, 94889, 94903, 94907, 94933, 94949, 94951, 94961, 94993, 94999, 95003, 95009, 95021, 95027, 95063, 95071, 95083, 95087, 95089, 95093, 95101, 95107, 95111, 95131, 95143, 95153, 95177, 95189, 95191, 95203, 95213, 95219, 95231, 95233, 95239, 95257, 95261, 95267, 95273, 95279, 95287, 95311, 95317, 95327, 95339, 95369, 95383, 95393, 95401, 95413, 95419, 95429, 95441, 95443, 95461, 95467, 95471, 95479, 95483, 95507, 95527, 95531, 95539, 95549, 95561, 95569, 95581, 95597, 95603, 95617, 95621, 95629, 95633, 95651, 95701, 95707, 95713, 95717, 95723, 95731, 95737, 95747, 95773, 95783, 95789, 95791, 95801, 95803, 95813, 95819, 95857, 95869, 95873, 95881, 95891, 95911, 95917, 95923, 95929, 95947, 95957, 95959, 95971, 95987, 95989, 96001, 96013, 96017, 96043, 96053, 96059, 96079, 96097, 96137, 96149, 96157, 96167, 96179, 96181, 96199, 96211, 96221, 96223, 96233, 96259, 96263, 96269, 96281, 96289, 96293, 96323, 96329, 96331, 96337, 96353, 96377, 96401, 96419, 96431, 96443, 96451, 96457, 96461, 96469, 96479, 96487, 96493, 96497, 96517, 96527, 96553, 96557, 96581, 96587, 96589, 96601, 96643, 96661, 96667, 96671, 96697, 96703, 96731, 96737, 96739, 96749, 96757, 96763, 96769, 96779, 96787, 96797, 96799, 96821, 96823, 96827, 96847, 96851, 96857, 96893, 96907, 96911, 96931, 96953, 96959, 96973, 96979, 96989, 96997, 97001, 97003, 97007, 97021, 97039, 97073, 97081, 97103, 97117, 97127, 97151, 97157, 97159, 97169, 97171, 97177, 97187, 97213, 97231, 97241, 97259, 97283, 97301, 97303, 97327, 97367, 97369, 97373, 97379, 97381, 97387, 97397, 97423, 97429, 97441, 97453, 97459, 97463, 97499, 97501, 97511, 97523, 97547, 97549, 97553, 97561, 97571, 97577, 97579, 97583, 97607, 97609, 97613, 97649, 97651, 97673, 97687, 97711, 97729, 97771, 97777, 97787, 97789, 97813, 97829, 97841, 97843, 97847, 97849, 97859, 97861, 97871, 97879, 97883, 97919, 97927, 97931, 97943, 97961, 97967, 97973, 97987, 98009, 98011, 98017, 98041, 98047, 98057, 98081, 98101, 98123, 98129, 98143, 98179, 98207, 98213, 98221, 98227, 98251, 98257, 98269, 98297, 98299, 98317, 98321, 98323, 98327, 98347, 98369, 98377, 98387, 98389, 98407, 98411, 98419, 98429, 98443, 98453, 98459, 98467, 98473, 98479, 98491, 98507, 98519, 98533, 98543, 98561, 98563, 98573, 98597, 98621, 98627, 98639, 98641, 98663, 98669, 98689, 98711, 98713, 98717, 98729, 98731, 98737, 98773, 98779, 98801, 98807, 98809, 98837, 98849, 98867, 98869, 98873, 98887, 98893, 98897, 98899, 98909, 98911, 98927, 98929, 98939, 98947, 98953, 98963, 98981, 98993, 98999, 99013, 99017, 99023, 99041, 99053, 99079, 99083, 99089, 99103, 99109, 99119, 99131, 99133, 99137, 99139, 99149, 99173, 99181, 99191, 99223, 99233, 99241, 99251, 99257, 99259, 99277, 99289, 99317, 99347, 99349, 99367, 99371, 99377, 99391, 99397, 99401, 99409, 99431, 99439, 99469, 99487, 99497, 99523, 99527, 99529, 99551, 99559, 99563, 99571, 99577, 99581, 99607, 99611, 99623, 99643, 99661, 99667, 99679, 99689, 99707, 99709, 99713, 99719, 99721, 99733, 99761, 99767, 99787, 99793, 99809, 99817, 99823, 99829, 99833, 99839, 99859, 99871, 99877, 99881, 99901, 99907, 99923, 99929, 99961, 99971, 99989, 99991]
n=10**5
similar = []

for i in prime_numbers:
    if (i+1) // 2 in prime_numbers:
        similar.append(i)
        
sim = [0]*(n+1)    
cnt = 0    
for i in range(n+1):
    if i in similar:
        cnt += 1
    sim[i]=cnt  

q = int(input())
for _ in range(q):
    l, r = list(map(int, input().split()))
    print(sim[r]-sim[l-1])
        

Fixed submission:
# -*- coding: utf-8 -*-
"""
Created on Sun Dec  2 18:42:44 2018
ABC084D
@author: maezawa
"""

n = int(10**5)
is_prime = [True]*(n+1)

is_prime[0] = False
is_prime[1] = False

for i in range(2, n//2):
    if is_prime[i] == True:
        for j in range(2*i,n+1,i):
            is_prime[j] = False

prime_numbers = set([i for i in range(n+1) if is_prime[i]])
similar = set([])

for i in prime_numbers:
    if (i+1) // 2 in prime_numbers:
        similar.add(i)
        
sim = [0]*(n+1)    
cnt = 0    
for i in range(n+1):
    if i in similar:
        cnt += 1
    sim[i]=cnt  

q = int(input())
for _ in range(q):
    l, r = list(map(int, input().split()))
    print(sim[r]-sim[l-1])

Buggy python submission (verdict: Time Limit Exceeded):
# -*- coding: utf-8 -*-
"""
Created on Sun Dec  2 18:42:44 2018
ABC084D
@author: maezawa
"""

n = int(10**5)
is_prime = [True]*(n+1)

is_prime[0] = False
is_prime[1] = False

for i in range(2, n//2):
    if is_prime[i] == True:
        for j in range(2*i,n+1,i):
            is_prime[j] = False

prime_numbers = [i for i in range(n+1) if is_prime[i]]
similar = []

for i in prime_numbers:
    if (i+1) // 2 in prime_numbers:
        similar.append(i)
        
sim = [0]*(n+1)    
cnt = 0    
for i in range(n+1):
    if i in similar:
        cnt += 1
    sim[i]=cnt  

q = int(input())
for _ in range(q):
    l, r = list(map(int, input().split()))
    print(sim[r]-sim[l-1])
        
        
    

Fixed submission:
# -*- coding: utf-8 -*-
"""
Created on Sun Dec  2 18:42:44 2018
ABC084D
@author: maezawa
"""

n = int(10**5)
is_prime = [True]*(n+1)

is_prime[0] = False
is_prime[1] = False

for i in range(2, n//2):
    if is_prime[i] == True:
        for j in range(2*i,n+1,i):
            is_prime[j] = False

prime_numbers = set([i for i in range(n+1) if is_prime[i]])
similar = set([])

for i in prime_numbers:
    if (i+1) // 2 in prime_numbers:
        similar.add(i)
        
sim = [0]*(n+1)    
cnt = 0    
for i in range(n+1):
    if i in similar:
        cnt += 1
    sim[i]=cnt  

q = int(input())
for _ in range(q):
    l, r = list(map(int, input().split()))
    print(sim[r]-sim[l-1])