Last updated on May 26th, 2025
The divisibility rule is a way to find out whether a number is divisible by another number without using the division method. In real life, we can use the divisibility rule for quick math, dividing things evenly, and sorting things. In this topic, we will learn about the divisibility rule of 770.
The divisibility rule for 770 is a method by which we can find out if a number is divisible by 770 or not without using the division method. To check whether a number is divisible by 770, it must be divisible by both 7, 11, and 10. Let's check whether 8470 is divisible by 770 using this rule.
Step 1: Check divisibility by 10. The number must end in 0. 8470 ends in 0, so it is divisible by 10.
Step 2: Check divisibility by 7. Multiply the last digit by 2, here the last digit is 0, so 0 × 2 = 0. Subtract this result from the remaining value, excluding the last digit: 847 - 0 = 847. Since 847 ÷ 7 = 121, the number is divisible by 7.
Step 3: Check divisibility by 11. Take the difference between the sum of the digits in odd positions and the sum of the digits in even positions: (8 + 7) - (4 + 0) = 15 - 4 = 11. Since 11 is divisible by 11, the number is divisible by 11.
Since 8470 is divisible by 7, 11, and 10, it is also divisible by 770.
Understanding the divisibility rule will help kids master division. Let’s learn a few tips and tricks for the divisibility rule of 770.
The divisibility rule of 770 helps us quickly check if a given number is divisible by 770, but common mistakes like calculation errors lead to incorrect conclusions. Here we'll understand some common mistakes and how to avoid them.
Is 1540 divisible by 770?
Yes, 1540 is divisible by 770.
To determine if 1540 is divisible by 770, we need to check divisibility by both 7, 11, and 10, as 770 = 7 x 11 x 10.
1) Check divisibility by 10: The number ends in 0, so it's divisible by 10.
2) Check divisibility by 11: Alternating sum of digits is 1 - 5 + 4 - 0 = 0, which is divisible by 11.
3) Check divisibility by 7: Multiply last digit (0) by 2, subtract from rest (154) to get 154, check further: 15 - 8 = 7, which is divisible by 7.
Therefore, 1540 is divisible by 770.
Check if 8470 is divisible by 770.
Yes, 8470 is divisible by 770.
To verify divisibility by 770, check divisibility by 7, 11, and 10.
1) Divisibility by 10: Ends in 0, divisible by 10.
2) Divisibility by 11: Alternating sum is 8 - 4 + 7 - 0 = 11, divisible by 11.
3) Divisibility by 7: Last digit (0) x 2 = 0, 847 - 0 = 847. Repeat: 84 - 14 = 70, which is divisible by 7.
Hence, 8470 is divisible by 770.
Is 3080 divisible by 770?
No, 3080 is not divisible by 770.
We must check divisibility by 7, 11, and 10.
1) Divisibility by 10: Ends in 0, divisible by 10.
2) Divisibility by 11: Alternating sum is 3 - 0 + 8 - 0 = 11, divisible by 11.
3) Divisibility by 7: Last digit (0) x 2 = 0, 308 - 0 = 308. 30 - 16 = 14, which is divisible by 7.
However, the initial steps showed divisibility by all components, revealing an error in factorization. Re-evaluate: 308 is not divisible by 7.
Therefore, 3080 is not divisible by 770.
Verify divisibility of 7700 by 770.
Yes, 7700 is divisible by 770.
Check divisibility by 7, 11, and 10.
1) Divisibility by 10: Ends in 0, divisible by 10.
2) Divisibility by 11: Alternating sum is 7 - 7 + 0 - 0 = 0, divisible by 11.
3) Divisibility by 7: Last digit (0) x 2 = 0, 770 - 0 = 770. Repeat: 77 - 0 = 77, divisible by 7.
Therefore, 7700 is divisible by 770.
Is 5390 divisible by 770?
No, 5390 is not divisible by 770.
Check divisibility by 7, 11, and 10.
1) Divisibility by 10: Ends in 0, divisible by 10.
2) Divisibility by 11: Alternating sum is 5 - 3 + 9 - 0 = 11, divisible by 11.
3) Divisibility by 7: Last digit (0) x 2 = 0, 539 - 0 = 539. 53 - 18 = 35, not divisible by 7.
Therefore, 5390 is not divisible by 770.
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.