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using<br />..<br />(a) 3945<br />(b) 4942<br />15. “Estimate the following rounding off nearest 100.<br

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using<br />..<br />(a) 3945<br />(b) 4942<br />15. “Estimate the following rounding off nearest 100.<br />945 623<br />on.<br />16. Estimate the following rounding off nearest 100.<br />945 – 560<br />.<br />17. Estimate product of 39 x 42<br />18. Write the numbers 137 and 198 into roman<br />numerals<br />ration.<br />19. Write each of the following in Hindu-Arabic<br />numeral<br />(a) XXIV<br />(by​

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Eva

Prove that :
2tan^{ – 1}(1 \div 3}) + cos^{ – 1} ({3 \div 5}) = \pi \div 2​

A contractor appoints 36 persons who complete 2/3 work in 16 days . To finish remaining work he appoints 12 more persons . In how

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