Which of the following is also known as the brain of the computer?

Refer the below table and answer the question.

Between 10pm to 6am, a fitness band records the data. How long was the user in light sleep or was in Extremely light sleep?

At what point does the line 3x + 2y = -12 intercept the Y-axis?

A bank offers 20% compound interest per half year. A customer deposits Rs 7600 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained from interest is

Δ DEF and Δ GHI are similar triangles. Length of AB is 10 cm and length of the corresponding side DE is 6 cm. What is the ratio of Perimeter of ΔABC to ΔDEF?

10% discount is offered on an item. By applying a promo code the customer wins 20% cash back. What is the effective discount?

To cover a distance of 333 km in 2 hours by a car, what should be the average speed of the car (in meter/second)?

If (1/4 of x) - (4/5 of 6/7) equals - 9/7, then value of x is