Directions-(Q. 1 - 10) What will come in place of question mark (?) in the following number series ?
(a) 264
(b) 278
(c) 265
(d) 291
(e) None of these
Answer : (b)
18+78=96
96+65=161
161+52=213
213+39=252
252+26=278
18+78=96
96+65=161
161+52=213
213+39=252
252+26=278
2. 7, 13, 24, 40, 61, ?
(a) 87
(b) 92
(c) 89
(d) 93
(e) None of these
Answer : (a)
7+6=13
13+11=24
24+16=40
40+21=61
61+26=87
7+6=13
13+11=24
24+16=40
40+21=61
61+26=87
3. 8, 12, 21,37,62,98 ?
(a) 98
(b) 238
(c) 240
(d) 206
(e) None of these
Answer : (e)
8+2^2 = 12
12+3^2 = 21
21 + 4^2 = 37
37 + 5^2 = 62
62 + 6^2 = 98
98 + 7^2 = 147
8+2^2 = 12
12+3^2 = 21
21 + 4^2 = 37
37 + 5^2 = 62
62 + 6^2 = 98
98 + 7^2 = 147
4. 3, 7, 19, 39, 67, ?
(a) 107
(b) 113
(c) 109
(d) 103
(e) None of these
Answer : (d)
3 + 4 = 7
7 +12 = 19
19+20=39
39+28=67
67+36=103
3 + 4 = 7
7 +12 = 19
19+20=39
39+28=67
67+36=103
5. 759, 423, 255, 171, 129, ?
(a) 118
(b) 107
(c) 98
(d) 92
(e) None of these
Answer : (e)
759 – 336 = 423
423 – 168 = 255
255 – 84 = 171
171 – 42 = 129
129 – 21 = 108
759 – 336 = 423
423 – 168 = 255
255 – 84 = 171
171 – 42 = 129
129 – 21 = 108
6. 18935, 3780, 750, 145, 25, ?
(a) 5
(b) 2
(c) 4
(d) 3
(e) None of these
Answer : (b)
18935 3780, 750, 145, 25, (2)
-35/5 -30/5 -25/5 -20/5 -15/5
18935 3780, 750, 145, 25, (2)
-35/5 -30/5 -25/5 -20/5 -15/5
7. 3, 10, 32, 111, ?, 2315, 13902
(a) 512
(b) 460
(c) 424
(d) 412
(e) None of these
Answer : (b)
(3+7)*1=10,
(10+6)*2=32
(32+5)*3=111
(111+4)*4=460
(460+3)*5=2315
(2315+2)*6=13902
(3+7)*1=10,
(10+6)*2=32
(32+5)*3=111
(111+4)*4=460
(460+3)*5=2315
(2315+2)*6=13902
8. 16, 24, ?, 210, 945, 5197.5, 33783.75
(a) 36
(b) 40
(c) 60
(d) 58
(e) None of these
Answer : (c)
16 * 1.5 = 24,
24 * 2.5 = 60
60 * 3.5 = 210
210 * 4.5 = 945
945 * 5.5 = 51975
51975 * 6.5 = 3378.75
16 * 1.5 = 24,
24 * 2.5 = 60
60 * 3.5 = 210
210 * 4.5 = 945
945 * 5.5 = 51975
51975 * 6.5 = 3378.75
9. 16, 15, 21, ?, 77, 195.5, 588.5
(a) 36.5
(b) 39
(c) 37.5
(d) 36
(e) None of these
Answer : (a)
16*0.5+7 = 15
15*1+6 = 21
21*1.5+5 = 36.5
36.5*2+4 = 77
77*2.5+3 = 195.5
195.5+3+2=588.5
16*0.5+7 = 15
15*1+6 = 21
21*1.5+5 = 36.5
36.5*2+4 = 77
77*2.5+3 = 195.5
195.5+3+2=588.5
10. 142, 871, 1383, 1726, 1942, 2067, ?
(a) 2283
(b) 2131
(c) 2134
(d) 2192
(e) None of these
Answer : (b)
142+729 = 871
871+512 = 1383
1383+343 = 1726
1726+216 = 1942
1942+125 = 2067
2067+64 = 2131
142+729 = 871
871+512 = 1383
1383+343 = 1726
1726+216 = 1942
1942+125 = 2067
2067+64 = 2131
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