Advertisements
Advertisements
प्रश्न
20 × 3 is a multiple of 3 if the digit × is ______ or ______ or ______.
Advertisements
उत्तर
20 × 3 is a multiple of 3 if the digit × is 1 or 4 or 7.
Explanation:
We know that, if a number is a multiple of 3, then the sum of its digits is again a multiple of 3, i.e. 2 + 0 + x + 3 is a multiple of 3.
x + 5 = 0, 3, 6, 9, 12, 15 But, x is a digit of the number 20 × 3.
x can take values 0, 1, 2, 3, ........ 9.
⇒ x + 5 = 6 or 9 or 12
Hence, x = 1 or 4 or 7
APPEARS IN
संबंधित प्रश्न
If \[\overline{{3x2}}\] is a multiple of 11, where x is a digit, what is the value of x?
Given an example of a number which is divisible by both 4 and 8 but not by 32.
Which of the following statement is true?
The sum of two consecutive odd numbers is always divisible by 4.
Do you remember magic triangles? Come now, let s make some magic squares.
- Fill this square using all the numbers from 46 to 54.
Rule: The total of each line is 150.
Look at the patterns of numbers in hexagons.
Each side has 2 circles and 1 box.
- Look at the number 65 in the box. Which are the circles next to it?
- Can you see how the rule works?
The difference of a two-digit number and the number obtained by reversing its digits is always divisible by ______.
The difference of three-digit number and the number obtained by putting the digits in reverse order is always divisible by 9 and ______.
If B × B = AB, then either A = 2, B = 5 or A = ______, B = ______.
If AB + 7C = 102, where B ≠ 0, C ≠ 0, then A + B + C = 14.
If 148101B095 is divisible by 33, find the value of B.
