Quantitative Quiz Questions for SBI PO

Directions (1 - 10): What will come in place of question mark (?) in the following number series ?

1. 8, 12, 21,37,62,98 ?

• (1) 98 
• (2) 238  
• (3) 240 
• (4) 206 
• (5) None of these

Ans: (5)
8+2^2  = 12
12+3^2 = 21
21 + 4^2 = 37
37 + 5^2 = 62
62 + 6^2 = 98
98 + 7^2 = 147

2. 7, 13, 24, 40, 61, ?

• (1) 87 
• (2) 92  
• (3) 89
• (4) 93 
• (5) None of these

Ans: (1)
7+6=13
13+11=24
24+16=40
40+21=61
61+26=87

3. 18, 96, 161, 213, 252, ?

• (1) 264 
• (2) 278  
• (3) 265 
• (4) 291 
• (5) None of these

Ans: (2)
18+78=96
96+65=161
161+52=213
213+39=252
252+26=278

4. 3, 7, 19, 39, 67, ?

• (1) 107 
• (2) 113  
• (3) 109
• (4) 103 
• (5) None of these

Ans: (4)
3 + 4 = 7
7 +12 = 19
19+20=39
39+28=67
67+36=103

5. 759, 423, 255, 171, 129, ?

• (1) 118 
• (2) 107  
• (3) 98 
• (4) 92 
• (5) None of these

Ans: (5)
759 – 336 = 423
423 – 168 = 255
255 – 84 = 171
171 – 42 = 129
129 – 21 = 108

6. 18935, 3780, 750, 145, 25, ?

• (1) 5  
• (2) 2  
• (3) 4  
• (4) 3  
• (5) None of these

Ans: (2)
18935  3780,   750,   145,   25,
 -35/5  -30/5  -25/5  -20/5  -15/5

7. 3, 10, 32, 111, ?, 2315, 13902

• (1) 512  
• (2) 460  
• (3) 424  
• (4) 412  
• (5) None of these

Ans: (2)
(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 

• (1) 36  
• (2) 40  
• (3) 60  
• (4) 58  
• (5) None of these

Ans: (3)
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 

• (1) 36.5  
• (2) 39  
• (3) 37.5  
• (4) 36  
• (5) None of these

Ans: (1)
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, ?

• (1) 2283  
• (2) 2131  
• (3) 2134
• (4) 2192  
• (5) None of these

Ans: (2)
142+729 = 871
871+512 = 1383
1383+343 = 1726
1726+216 = 1942
1942+125 = 2067
2067+64 = 2131