`7474+4747=?xx25`

7825 - 9236 + 5234 = ? xx 25

7825-9236+5234=? xx 25

Find the value of the following: 25xx4xx4-(3xx25xx4)

Simplify: (i) ((2.75xx2.75xx2.75-2.25xx.2.25xx2.25)/(2.75xx2.75+2.75xx2.25+2.25xx2.25))((0.0347xx0.0347xx0.0347+0.9653xx0.9653xx0.9653)/(0.0347xx0.0347-0.0347xx0.9653+0.9653xx0.9653))

4 xx 538 xx 25=?

24 xx 25 = 24 xx

Given two numbers 15 and 25, find their HCF and LCM and verify that HCF xx LCM =15 xx 25