book Maths Puzzle Numerical Ability

A piggy bank contains 5-centavo and 10-centavo coins amounting to PHP 30.50. If there are 19 more 5-centavo coins than 10-centavo coins, how many coins are in the piggy bank?

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book Other Question

Find the distance between the points (3,17) and (-2,5)

a: 13
b: sq. rt. of 145
c: sq. rt. of 458
d: 3 sq rt. of 51
e: none of these a 16 foot guywire reaches from the top of a pole to a point on the ground 9 feet from the bottom of the pole?