Three men step off together from the same spot, Their steps measures 63 cm, 70 cm and 77 cm respectively. …

Find the least number which divide separately by 15, 20, 36 and 48 leaves 3 as remainder in each case …

If a distance of 50 m is covered in 1 min, that 90 mt. in 2 min and 130 m …

What is the smallest number by which 625 must be divide so that the quotient is a perfect cube ? …

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