- 68:140:: ? :120
a) 55 b) 65 c)75 d)85
view ans answer(c) (6+8)*10=140 so (7+5)*10=120
2. 7:49::5:?
a) 10 b) 15 c) 20 d) 25
view ans answer(d) 7^2 = 49 so 5^2 = 25
3. 42:20::64:?
a) 29 b) 30 c) 31 d) 32
view ans answer(c) (x:x/2)-1 relation
4. 289::272::361:?
a) 20 b) 30 c) 31 d) 32
view ans answer(b) 289=17^2, 272=17^2-17 so 361=19^2, 19^2-19=342
5. 54:45::32:?
a) 42 b) 52 c) 23 d) 18
view ans answer(c) reverse order i.e reverse of 54 is 45
6. 442::663::884:?
a) 331 b) 533 c) 321 d) 221
view ans answer(d) 10th and 100th digits are same and unit digit is half of 10th or 100th digit
7. 87:9::53:?
a) 17 b) 18 c) 19 d) 20
view ans answer(b) first reverse digit and subtract it i.e 87-79 = 9, so 53-35 = 18
8. 12:20::42:?
a) 52 b) 54 c) 56 d) 58
view ans answer(c) 3^2 + 3 = 12, 4^2 +4 = 20, 6^2 + 6 = 42 so 7^2 +7 = 56
9. 5:35::6:?
a) 40 b) 42 c) 44 d) 46
view ans answer(b) x:7x so 6*7 = 42
10. 3:12::?
a) 4:15 b) 5:23 c) 6:19 d) 7:15
view ans answer(b) 1 +2 = 3 so 2 +3 = 5
