Huseyin can complete some work in 42 days, while Ezgi can complete the same work in 7 days. They started the work together, and when the work was half complete, Ezgi fell ill and Huseyin had to finish the remaining work. How long did it take to complete the work?

Melisa says, "If Mustafa gives me ₺35 he will have half as much as Hasan. But if Hasan gives me ₺35 then three of us will have the same amount. What is the total amount of money that Melisa, Mustafa and Hasan have among them?

Selim sells his two cars at the rate of ₺ 4 lacs each. On one car he gains 4% while on other car he incurs a loss of 4%. Find his total loss/gain in whole transaction.

Two coins are tossed simultaneously ^@ 800 ^@ times and it is found that two tails appeared ^@ 400 ^@ times, one tail appeared ^@ 240 ^@ times and no tails appeared ^@ 160 ^@ times.
If two coins are tossed at random, what is the probability of getting ^@ 2 \text { tails } ^@?

The sum of the digits of a 2-digit number is subtracted from the number. The resulting number has the units digit of 6. Which numbers have this property?