Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 428 · 40 questions

Thinking tip (Enough facts, then decide): Not enough evidence: “One mango was sour, so all are sour.” Enough: “We checked all 40 mangoes; every one was ripe.” Before you answer, check every fact you need is given. 7 rows with 9 in each → 7 × 9 = 63. “A box has 9 in each row” with no number of rows → not enough info. Missing facts hide in words like “and a bag”, “older” (by how much?) and “a long film” (how long?).

1. 1.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) yes, it is certain (b) no, check more (c) yes, mangoes match (d) no mango is sweet
2. 2.🧩 A box has 7 rows of oranges, with 8 in each row. How many oranges are in the box? (a) 56 (b) 15 (c) not enough info (d) 64
3. 3.🧩 Arjun bought 5 notebooks and a bag for ₹105 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹21 (c) ₹100 (d) ₹105
4. 4.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
5. 5.🧩 Kabir is 12 years old. Ishaan is 9 years older than Kabir. How old is Ishaan? (a) 9 (b) 22 (c) 21 (d) not enough info
6. 6.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
7. 7.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
8. 8.🧩 Meera is 6 years old. Diya is older than Meera. How old is Diya? (a) 7 (b) not enough info (c) 11 (d) 8
9. 9.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
10. 10.🧩 Saanvi is 7 years old. Kabir is 4 years older than Saanvi. How old is Kabir? (a) 4 (b) 12 (c) not enough info (d) 11
11. 11.🧩 The film starts at 4 PM and lasts 1 hour. When does it end? (a) 6 PM (b) not enough info (c) 4 PM (d) 5 PM
12. 12.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
13. 13.🧩 The film starts at 2 PM. It is a long film. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
14. 14.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) False (b) True
15. 15.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) 7 PM (b) 6 PM (c) 8 PM (d) not enough info
16. 16.🧩 A box has 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 45 (b) 13 (c) 40 (d) not enough info
17. 17.🧩 A box has 3 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 18 (b) 24 (c) 9 (d) not enough info
18. 18.🧩 Kabir bought 2 mangoes and a cap for ₹50 in all. Each mango cost the same. What did one mango cost? (a) ₹48 (b) ₹50 (c) ₹25 (d) not enough info
19. 19.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a guess (d) a rumour
20. 20.🧩 Arjun is 6 years old. Tara is older than Arjun. How old is Tara? (a) not enough info (b) 7 (c) 8 (d) 11
21. 21.🧩 A box of mangoes has 6 in each row. How many mangoes are in the box? (a) not enough info (b) 60 (c) 6 (d) 12
22. 22.🧩 Aarav bought 5 kites for ₹75 in all. Each kite cost the same. What did one kite cost? (a) ₹20 (b) ₹15 (c) ₹75 (d) not enough info
23. 23.True or false: “My friend didn’t like the book, so the book is bad for everyone.” gives enough evidence. (a) True (b) False
24. 24.🧩 Before solving a word problem, first check… (a) your handwriting (b) the colour of ink (c) the page number (d) what facts are given
25. 25.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Vihaan is 7 years old. Rohan is 3 years older than Vihaan. How old is Rohan? (a) 10 (b) not enough info (c) 3 (d) 11
27. 27.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) guessing (c) asking your pet (d) asking one friend
28. 28.🧩 A box has 7 rows of laddoos, with 9 in each row. How many laddoos are in the box? (a) 16 (b) not enough info (c) 72 (d) 63
29. 29.🧩 Kabir is 11 years old. Ananya is 6 years older than Kabir. How old is Ananya? (a) 17 (b) 6 (c) 18 (d) not enough info
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
31. 31.🧩 Meera bought 3 mangoes for ₹60 in all. Each mango cost the same. What did one mango cost? (a) not enough info (b) ₹20 (c) ₹25 (d) ₹60
32. 32.🧩 Rohan is 7 years old. Nisha is older than Rohan. How old is Nisha? (a) 8 (b) 12 (c) 9 (d) not enough info
33. 33.🧩 Kabir bought 5 kites for ₹250 in all. Each kite cost the same. What did one kite cost? (a) ₹250 (b) not enough info (c) ₹55 (d) ₹50
34. 34.🧩 A box has 3 rows of eggs, with 9 in each row. How many eggs are in the box? (a) 12 (b) 27 (c) 36 (d) not enough info
35. 35.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
36. 36.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 5 PM (b) not enough info (c) 7 PM (d) 6 PM
37. 37.🧩 Kabir is 7 years old. Ishaan is 7 years older than Kabir. How old is Ishaan? (a) 7 (b) not enough info (c) 15 (d) 14
38. 38.🧩 Saanvi bought 6 markers and a bag for ₹150 in all. Each marker cost the same. What did one marker cost? (a) ₹144 (b) ₹150 (c) not enough info (d) ₹25
39. 39.🧩 Vihaan is 10 years old. Ishaan is 2 years older than Vihaan. How old is Ishaan? (a) 2 (b) not enough info (c) 13 (d) 12
40. 40.🧩 A box has 3 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 20 (b) 8 (c) not enough info (d) 15

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