alleryStart learning →Names swap: sun to moon, moon to star, star to cloud. What is the daylight giver now called?
- Moon
- Sun
- Star
- Cloud
Show answer and solution
Correct answer: A. Moon
The sun gives us daylight, and in this code the sun is called the moon.
Olympiad (Class 4) Coding and decoding — practice questions — page 2
Explore 63 free Coding and decoding questions in Olympiad (Class 4) Reasoning. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 31–60 of 63.
Names swap: sun to moon, moon to star, star to cloud. What is the daylight giver now called?Read the answer and worked solution →CAT turned into DBU and DOG into EPH by one rule. Using that rule, what does BAT turn into?Read the answer and worked solution →If a rule turns MAT into NBU, what will it turn SAT into?Read the answer and worked solution →PEN became QFO under a rule. Under the same rule, TEN becomes what?Read the answer and worked solution →A rule makes RAIN into SBJO. What does PAIN become?Read the answer and worked solution →Reverse spelling turns BOOK into KOOB. What does reverse spelling make of DESK?Read the answer and worked solution →Spell STAR from its last letter to its first. Which word do you read?Read the answer and worked solution →In a code, words are written backwards. Which word is written as TAC?Read the answer and worked solution →Replace each vowel with a star in the word APPLE. What do you see?Read the answer and worked solution →Which pattern shows BANANA when each A is hidden behind a star?Read the answer and worked solution →In a code, each word is written as the number of its letters, so TREE is 4. How is PENCIL written?Read the answer and worked solution →Leap two letters ahead for each letter in EGG. What is the new word?Read the answer and worked solution →Mina hides the word KITE by writing the following letter each time. What does it look like?Read the answer and worked solution →LAMP becomes a secret word by bumping each letter up by one. Which is it?Read the answer and worked solution →When the next letter after Z is needed, go back to A. Using next letters, change ZOO.Read the answer and worked solution →A secret word DPEF was formed by using the next letter each time. Find the real word.Read the answer and worked solution →With next-letter hiding, the word TFB is on a slip. Which word was hidden?Read the answer and worked solution →ECV was made by pushing each letter two steps ahead. Which word does it hide?Read the answer and worked solution →A secret code that moves every letter along the alphabet is named after which Roman leader?Read the answer and worked solution →Julius Caesar is said to have moved each letter 3 places, so A became D. What did B become?Read the answer and worked solution →In one secret code, letters are swapped for other letters. What is this kind of code called?Read the answer and worked solution →A secret code keeps the same letters but puts them in a new order. What is it called?Read the answer and worked solution →Morse code sends letters using which two kinds of signals?Read the answer and worked solution →Morse code is named after which person?Read the answer and worked solution →In Morse code, which letter is used most often in English and has the shortest code of one dot?Read the answer and worked solution →The distress call SOS in Morse is three dots, three dashes, three dots. Count all the signals.Read the answer and worked solution →In Morse code, A is dot dash and T is a single dash. How is the word AT written?Read the answer and worked solution →Which children's toy can be used to hide messages by shifting letters in a Caesar code?Read the answer and worked solution →Every letter in a message moves the same number of places along the alphabet. What is this code called?Read the answer and worked solution →Match each coding rule with its applied example:Read the answer and worked solution →
Worked practice questions
CAT turned into DBU and DOG into EPH by one rule. Using that rule, what does BAT turn into?
- CAU
- BBU
- CBU
- DBU
Show answer and solution
Correct answer: C. CBU
Each letter moves one step forward, so B becomes C, A becomes B and T becomes U, giving CBU.
If a rule turns MAT into NBU, what will it turn SAT into?
- UBT
- SBU
- TBU
- TAU
Show answer and solution
Correct answer: C. TBU
The code moves each letter one step forward, so S becomes T, A becomes B and T becomes U.
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