Hence, the required number = (100 x 6+10 x3 +9) = 639.
EXERCISE 5A
1. The units digit of a two-digit number is 3 and seven times the sum of the digits is the
number itself. Find the number.
2. In a two-digit number, the digit at the units place is double the digit in the tens place. The number
exceeds the sum of its digits by 18. Find the number.
3. A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the
number, its digits are reversed. Find the number.
4. The sum of the digits of a two-digit number is 15. The number obtained by interchanging its
digits exceeds the given number by 9. Find the original number.
5. The difference between a 2-digit number and the number obtained by interchanging its
digits is 63. What is the difference between the digits of the number?
6. In a 3-digit number, the tens digit is thrice the units digit and the hundreds digit is four
times the units digit. Also, the sum of its digits is 16. Find the number.
VARIOUS TESTS OF DIVISIBILITY
1. Test of Divisibility By 2
Answers
Answer:
EXERCISE 5A
1. The units digit of a two-digit number is 3 and seven times the sum of the digits is the
number itself. Find the number.
2. In a two-digit number, the digit at the units place is double the digit in the tens place. The number
exceeds the sum of its digits by 18. Find the number.
3. A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the
number, its digits are reversed. Find the number.
4. The sum of the digits of a two-digit number is 15. The number obtained by interchanging its
digits exceeds the given number by 9. Find the original number.
5. The difference between a 2-digit number and the number obtained by interchanging its
digits is 63. What is the difference between the digits of the number?
6. In a 3-digit number, the tens digit is thrice the units digit and the hundreds digit is four
times the units digit. Also, the sum of its digits is 16. Find the number.
VARIOUS TESTS OF DIVISIBILITY
1. Test of Divisibility By 2
Answer:
Step-by-step explanation:
Question
Hence, the required number = (100 x 6+10 x3 +9) = 639.
EXERCISE 5A
1. The units digit of a two-digit number is 3 and seven times the sum of the digits is the
number itself. Find the number.
2. In a two-digit number, the digit at the units place is double the digit in the tens place. The number
exceeds the sum of its digits by 18. Find the number.
3. A two-digit number is 3 more than 4 times the sum of its digits. If 18 is added to the
number, its digits are reversed. Find the number.
4. The sum of the digits of a two-digit number is 15. The number obtained by interchanging its
digits exceeds the given number by 9. Find the original number.
5. The difference between a 2-digit number and the number obtained by interchanging its
digits is 63. What is the difference between the digits of the number?
6. In a 3-digit number, the tens digit is thrice the units digit and the hundreds digit is four
times the units digit. Also, the sum of its digits is 16. Find the number.
VARIOUS TESTS OF DIVISIBILITY
1. Test of Divisibility By 2