Advertisements
Advertisements
Question
Work out the following multiplication.
12345679
× 9
Use the result to answer the following question.
By what number should 12345679 be multiplied to get 999999999?
Advertisements
Solution
12345679
We have, × 9
111111111
Here, we observe that in the product all the digits are same i.e. 1, which is actually the unit digit of the product 9 × 9. Also, total of digits in the multiplier is 90°.
To get the number 9 in the product we have to find out a two-digit number whose sum of digits is 9 and the product of its unit’s digit with the unit’s digit of the given number is 9, such number is 81.
APPEARS IN
RELATED QUESTIONS
Find the values of the letters in the following and give reasons for the steps involved.
A B
+ 3 7
------
6 A
------
| A | |
| + | A |
| + | A |
| B | A |
Find the value of the letters in the following question.
8 5
+ 4 A
B C 3
Find the value of the letters in the following question.
B A A
+ B A A
3 A 8
Find the value of the letters in the following question.
A B
– B 7
4 5
If 2A7 ÷ A = 33, then find the value of A.
212 × 5 is a multiple of 3 and 11. Find the value of x.
A three-digit number 2 a 3 is added to the number 326 to give a three-digit number 5b9 which is divisible by 9. Find the value of b – a.
Let E = 3, B = 7 and A = 4. Find the other digits in the sum
B A S E
+ B A L L
G A M E S
Find the value of the letters in the following:
2 L M
+ L M 1
M 1 8
