Select the correct combination of mathematical signs to replace the * signs and to balance the given equation.
 91 * 15 * 5 * 18 * 37

Pointing to the photo of a man, a woman said, “His brother’s father is the only son of my grandfather.” How is the woman related to the man in the photo?

The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs except one. Find that odd number pair.

Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

. If, 4 × 3 = 14; 5 × 4 = 18; 6 × 5 = 22, then find the value of 7 × 6.

Directions : In which answer figure is the question figure embedded?

Question Figure

Study the following figures and find out the number opposite to 3.

Direction: Some equations have been solved on the basis of certain system. Find the correct answer for the unsolved equation on that basis.

If 10 – 3 = 12, 12 – 4 = 13, 14 – 5 = 14, then 16 – 6 = ?

Directions: Study the following information carefully and answer the questions that follow.
 Eight people – Aishwarya, Kavya, Surabhi, Sangeetha, Shruthi, Swathi, Anita and Meghana were born in different years 1983, 1988, 1991, 1993, 1996, 2000, 2006 and 2012 not necessarily in the same order. Kavya’s age is a multiple of 5. Three people were born between Kavya and Meghana. Swathi is born before Kavya, but she is not the eldest person. Four people were born between Swathi and Anita, who is not the youngest person. Surabhi was born just before Aishwarya. Only one person was born between Sangeetha and Shruthi. Sangeetha is not the youngest person.

Note: 

(1) All calculations are done with respect to the present year, 2021 assuming the month and date to be same as that of the years as mentioned above.
(2) Each person is assumed to born on the same date and same month of the respective years.

Who is the eldest person in the group?