A biased coin has probability of heads 0.7, it has tossed 3 times. What is the probability of getting exactly 2 heads.

A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?

If you multiply all the numbers on a standard telephone dialpad together, what is the final result?

The day before two days after the day before tomorrow is Saturday." What day is it today?

Can you find two numbers that add up to 10 but multiply to 100?

You drive 60 miles to your destination at a constant speed of 30 mph. On the way back, you travel the same distance at 60 mph. What was your average speed for the entire round trip?

In a famous "false proof" that 1 = 2, a mathematician starts with a = b, multiplies both sides by a (a² = ab), subtracts b²from both sides, factors them, and cancels out (a - b). What is the fundamental error in this logic?