What has 13 hearts but no other organs?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?

Find the next number in the following series:
6, 14, 26, 98, __?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

How many times do a clock's hands overlap in a day ?

Four people need to cross a rickety bridge at night. Unfortunately, they have only one torch and the bridge is too dangerous to cross without one. The bridge is only strong enough to support two people at a time. Not all people take the same time to cross the bridge. Times for each person: 1 min, 2 mins, 7 mins and 10 mins. What is the shortest time needed for all four of them to cross the bridge?

A solo dice game is played. In this game, upon each turn, a normal pair of dice is rolled and the score is calculated not by adding the numbers but multiplying them.

In a particular game, the score for the second roll is five more than what was achieved in the first roll. The score for the third roll is six less than what was completed in the second roll. The score for the fourth roll is eleven more than what was achieved in the third. The score for the fifth roll is eight less than what was completed in the fourth.

Can you calculate the score for each of the five throws?

The centre of the third figure is empty. What digit should fit inside?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10