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sorry sis didn't understood.........
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Step-by-step explanation:
9)-Let present age of mother be 3x
Let present age of son be x
Then,
After 5 yrs
Mother will be 3x+5
Son will be x+5
By adding both eq
3x+5+x+5=70
3x+x+5+5=70
4x=70
x=70/4
x=17.5
Therefore sons present age is 17.5 and mother is 3*17.5= 52.5
10)- 50 numbers
So between the squares of 25 and 26, there are 50 numbers that lie between them the third one.
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