Class 3 Computational Thinking & AI
Official CBSE Student Handbook curriculum with 280 interactive practice questions (20 questions per chapter), pattern recognition puzzles, cipher wheels, spatial 3D views, and step-by-step logic solutions.
What's in a Name?
What's in a Name? introduces foundational cryptography through Caesar Ciphers, letter shift wheels, secret messages, and word decomposition logic.
Practice Questions (20)
Click an option to test your solutionRIYA writes her name in a pattern: R-I-Y-A-R-I-Y-A-R-I-... What is the 13th letter?
Hint: Divide 13 by the length of the pattern (4) and use the remainder to find the position.
The name MEENA has how many vowels?
Hint: Count only the letters A, E, I, O, U in the name.
AMAN writes A-M-A-N repeatedly. Which letter comes at position 22?
Hint: Divide 22 by 4. The remainder tells you the position in AMAN.
Which name has the MOST letters?
Hint: Count the letters in each name and compare.
The name KAVYA is written. How many letters come AFTER the letter V?
Hint: Find V in the name, then count all letters that come after it.
Which pair of names has the SAME number of letters?
Hint: Count the letters in each name of every option.
SUNITA writes her name. If she crosses out all vowels, how many letters remain?
Hint: First list all vowels (A, E, I, O, U) in the name, then subtract from the total.
Which name is a PALINDROME (reads the same forwards and backwards)?
Hint: Spell each name backwards and check if it matches the original spelling.
The name POOJA has a pattern of vowels and consonants. What is the pattern?
Hint: Mark each letter: C for consonant, V for vowel. Check A, E, I, O, U are vowels.
A name starts with the 4th letter of the alphabet, ends with the last letter, and has 3 letters total. What is the name?
Hint: The alphabet order: A=1, B=2, C=3, D=4... Z=26. Fill in the middle letter logically.
In a Caesar Cipher with a shift of +3 (A → D, B → E, C → F): What is the encrypted message for 'CAT'?
Hint: Shift each letter 3 places forward: C → F, A → D, T → W.
If you write the numbers in words, which one has EXACTLY ONE vowel in its spelling?
Hint: 'SIX' has only 1 vowel (I).
X is a single-digit number (0 to 9). If X has EXACTLY 5 letters in its spelling, how many different values can X have?
Hint: THREE (5), SEVEN (5), EIGHT (5). Total = 3 numbers.
What is the secret message if 'KHOOR' is decoded with a Caesar Cipher shift of 3 backward (-3)?
Hint: K → H, H → E, O → L, R → O = HELLO.
How many letters are in the number name for 100 ('ONE HUNDRED') excluding spaces?
Hint: ONE (3) + HUNDRED (7) = 10 letters.
Which number name contains all of the letters: E, I, G, H, T?
Hint: All three words start with the root 'EIGHT'.
If A=1, B=2, C=3... Z=26, what is the letter sum of the word 'CAB'?
Hint: 3 + 1 + 2 = 6.
Which letter appears most frequently in the word 'MATHEMATICS'?
Hint: M=2, A=2, T=2.
What 4-letter number name starts with 'Z' and ends with 'O'?
Hint: The number 0 is spelt Z-E-R-O.
If 'DOG' is coded as 'EPH' (+1 shift), how is 'CAT' coded?
Hint: C + 1 = D, A + 1 = B, T + 1 = U → DBU.
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