Number System · Question 25 · Medium
The 5-digit number 53a4b is divisible by both 5 and 9, where a and b are digits and b is not 0. What is the value of a?
- 6
- 3
- 1
- 0
Answer and explanation
Answer: C. 1
Explanation: Divisible by 5 with b ≠ 0 means b = 5. The digit sum 5 + 3 + a + 4 + 5 = 17 + a must be a multiple of 9, so a = 1 (the number is 53145).
Previous: A number leaves a remainder of 4 when divided by 7. What remainder will the… · Next: How many numbers from 1 to 500 (both inclusive) are divisible by 3 or 5?
Practise number system
Try a fresh set of number system questions with an explanation after every answer, free and without signing up: Number System practice. Or sit a full placement mock test.
More number system questions
- What is the highest power of 3 that exactly divides 50! (50 factorial)?
- What is the sum of all the divisors (factors) of 72, including 1 and 72?
- A number leaves a remainder of 4 when divided by 7. What remainder will the…
- How many numbers from 1 to 500 (both inclusive) are divisible by 3 or 5?
- What is the remainder when 1! + 2! + 3! + ... + 100! is divided by 12?
- What is the remainder when 7^85 is divided by 342?
- What are the last two digits of 7^2026?
- How many even divisors (factors) does 2520 have?
More quantitative aptitude practice
HCF & LCM · Simplification · Percentages · Profit & Loss · Simple & Compound Interest · Ratio & Proportion · Averages · Problems on Ages
LogicWiz Exams home · All practice topics · Placement mock tests · Daily 10 challenge