Question

In the following figure numbers are written with a specific rule. Find the rule and decide which alternative will be in place of question mark.

1)

(1) 140 

(2) 220 

(3) 320 

(4) 500

2) 

(1) 19 

(2) 23 

(3) 31 

(4) 25

Answer 1

1)  (4) 500

Multiply the corner elements with each other i.e., 15 x 6 x 4 = 360  then ∴ divided it by 10 

∴ 360 ÷ 10 = 36 is the middle no.

Q 50 x 10 x 10 = 5000 ÷ 10 = 500

2)  (3) 31

Addition of square [3] not of adjacent Number.

25 = 5

64 = 8

is 144 = 12

96 = 6

= 31