Apedia Logo Apedia
Join Now
✕
Full View
Arithmetic Ability
Number System
EN हिंदी
✕
DSSSB PRT 2022 Afternoon 📅 16 Mar, 2022

If a number Y587X is exactly divisible by 90, what is the value of Y - X?

A
4
B
3
C
5
D
7
Result Summary
Logo

APEDIA

DSSSB PRT
2022 • 16 Mar, 2022 • Afternoon
If a number Y587X is exactly divisible by 90, what is the value of Y - X?
Correct Answer
7
• **Divisibility by 90:** Divisible by 10 (X=0) and 9 (Sum of digits divisible by 9). • **Find X:** X must be 0. Number: Y5870. • **Find Y:** Sum = Y + ......
Ref/Book : DSSSB PRT 2022
Ref. Subject Maths
Chapter -
Ref. Topic Divisibility
Pg. No -
💡 Analysis & Explanation
• **Divisibility by 90 ▼
** Divisible by 10 (X=0) and 9 (Sum of digits divisible by 9).
• **Find X ▼
** X must be 0. Number: Y5870.
• **Find Y ▼
** Sum = Y + 5 + 8 + 7 + 0 = Y + 20.
• **Next multiple of 9 ▼
** 27. So Y + 20 = 27 -> Y = 7.
• **Result ▼
** Y - X = 7 - 0 = 7.
← Prev
48 / 200
Next →