# XAT 2021

Instructions

For the following questions answer them individually

Question 21

# An encryption system operates as follows:Step 1. Fix a number k $$(k \leq 26)$$.Step 2. For each word, swap the first k letters from the front with the last k letters from the end in reverse order. If a word contains less than 2k letters, write the entire word in reverse order.Step 3. Replace each letter by a letter k spaces ahead in the alphabet. If you cross Z in the process to move k steps ahead, start again from A.Example: k = 2: zebra --> arbez --> ctdgb.If the word “flight” becomes “znmorl” after encryption, then the value of k:

Instructions

The following plot describes the height (in cm), weight (in kg), age (in years) and gender (F for female, M for male) of 20 patients visiting a hospital.

A person’s body mass index (BMI) is calculated as weight (in kg) divided by squared height (measured in square metres). For example, a person weighing 100 kg and of height 100 cm (1m) will have a BMI of 100. A person with BMI less than or equal to 18.5 is considered as underweight, above 18.5 but less than or equal to 25 as normal weight, above 25 but less than or equal to 30 as overweight, and above 30 as obese.

Question 22

Question 23

Question 24

# The BMI of the oldest person considered as normal weight is approximately

Instructions

For the following questions answer them individually

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

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