Correct Answer - Option 1 : 20
Given:
the 7-digit number 2y6810x is divisible by 88.
Concept used:
Divisibility
Calculation:
If a number is divisible by 88 means it is divisibly by 11 and 8
⇒ 11 × 8 = 88
To check the divisibility of 8 check the last three digits
In 10x let the x be 4
104 is completely divisible by 8
∴ x = 4
Divisibility of 11
⇒ (sum of digits at odd places - Sum of digits at even places) = 0 or 11
⇒ (4 + 1 + 6 + 2) - (y + 8) = 0
⇒ 13 - y - 8 = 0
∴ y = 5
Product of x and y
⇒ 4 × 5 = 20
