Advertisements
Advertisements
प्रश्न
Work out the following multiplication.
12345679
× 9
Use the result to answer the following question.
What will be 12345679 × 45?
Advertisements
उत्तर
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°.
12345679
We have to compute, × 45
Here, multiplier is 45 whose sum of digits is 9.
Thus, by conjecture we conclude that the product consists of digits 5 only as unit’s digit of 9 × 5 is 5
12345679
∴ × 45
555555555
APPEARS IN
संबंधित प्रश्न
Find the value of the letter in the following and give reasons for the steps involved.
1 A
x A
------
9 A
------
Find the values of the letters in the following and give reasons for the steps involved.
A B
+ 3 7
------
6 A
------
Find the values of the letters in the following and give reasons for the steps involved.
A B
x 5
-------
C A B
-------
Find the values of the letters in the following and give reasons for the steps involved.
A B
x 6
-------
B B B
-------
If 
where Q – P = 3, then find the values of P and Q.
Find the value of the letters in the following question.
1 B A
+ A B A
8 B 2
Find the value of the letters in the following question.
A 0 1 B
+ 1 0 A B
B 1 0 8
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.
Work out the following multiplication.
12345679
× 9
Use the result to answer the following question.
What will be 12345679 × 63?
Work out the following multiplication.
12345679
× 9
Use the result to answer the following question.
By what number should 12345679 be multiplied to get 888888888?
