Question

42-5=4, 63-9=5 , 86-10=?

Answer 1

• Given:- 42-5=4, 63-9=5

•To find:- 86-10=?

• Solution:- According to the series

the format is like

ab-c = [(a×b)+1 - c] ÷ ( 1+0,1,2,3,....)= d

so

42 - 5= [(4×2)+ 1 - 5] ÷ 1 = 4 (here 'a' is 4 & 2 is the 'b' and 5 is the 'c']

63 - 9 = [(6×3)+1 - 9] ÷ 2 = 5

so,

86 - 10 = [(8×6)+1 - 10]÷ 3 = 13

So the final answer is 42-5=4, 63-9=5 , 86-10 = 13