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
Find the quotient when the difference of 985 and 958 is divided by 9.
Which of the following statement is true?
If a number is divisible by 8, it must be divisible by 4.
Which of the following statement is true?
If two numbers are co-prime, at least one of them must be a prime number.
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?
If 5A × A = 399, then the value of A is ______.
A four-digit number abcd is divisible by 11, if d + b = ______ or ______.
If B × B = AB, then either A = 2, B = 5 or A = ______, B = ______.
If the digit 1 is placed after a 2-digit number whose tens is t and ones digit is u, the new number is ______.
If 148101B095 is divisible by 33, find the value of B.
