Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 370 · 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.🧩 A box has 5 rows of eggs, with 5 in each row. How many eggs are in the box? (a) 10 (b) 30 (c) 25 (d) not enough info
2. 2.🧩 Ishaan bought 5 kites for ₹200 in all. Each kite cost the same. What did one kite cost? (a) not enough info (b) ₹45 (c) ₹200 (d) ₹40
3. 3.🧩 Rohan bought 2 markers and a bag for ₹170 in all. Each marker cost the same. What did one marker cost? (a) ₹85 (b) ₹168 (c) ₹170 (d) not enough info
4. 4.🧩 Before solving a word problem, first check… (a) the page number (b) your handwriting (c) the colour of ink (d) what facts are given
5. 5.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
6. 6.🥭 You taste one mango from a box of 50, and it is sweet. Can you be sure all 50 are sweet? (a) no mango is sweet (b) no, check more (c) yes, mangoes match (d) yes, it is certain
7. 7.🧩 The film starts at 2 PM and lasts 1 hour. When does it end? (a) 2 PM (b) 4 PM (c) not enough info (d) 3 PM
8. 8.🧩 The film starts at 5 PM. It is a long film. When does it end? (a) not enough info (b) 6 PM (c) 8 PM (d) 7 PM
9. 9.🧩 Meera is 10 years old. Diya is 6 years older than Meera. How old is Diya? (a) 17 (b) 16 (c) 6 (d) not enough info
10. 10.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
11. 11.🧩 Diya bought 3 pens and a bag for ₹110 in all. Each pen cost the same. What did one pen cost? (a) ₹107 (b) ₹110 (c) ₹36 (d) not enough info
12. 12.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) not enough info (d) 4 PM
13. 13.🧩 A box of oranges has 9 in each row. How many oranges are in the box? (a) not enough info (b) 90 (c) 18 (d) 9
14. 14.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
15. 15.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 50 (b) 5 (c) 10 (d) not enough info
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) False (b) True
17. 17.🧩 Saanvi is 6 years old. Ishaan is 7 years older than Saanvi. How old is Ishaan? (a) 7 (b) 13 (c) 14 (d) not enough info
18. 18.🧩 Ishaan bought 2 pens and a lunch box for ₹160 in all. Each pen cost the same. What did one pen cost? (a) ₹80 (b) not enough info (c) ₹160 (d) ₹158
19. 19.🧩 Rohan is 10 years old. Diya is older than Rohan. How old is Diya? (a) 12 (b) 15 (c) 11 (d) not enough info
20. 20.🧩 Enough evidence or not? “My friend didn’t like the book, so the book is bad for everyone.” (a) enough evidence (b) not enough evidence
21. 21.🧩 Diya is 6 years old. Kabir is older than Diya. How old is Kabir? (a) not enough info (b) 8 (c) 7 (d) 11
22. 22.🧩 Diya bought 6 pens for ₹270 in all. Each pen cost the same. What did one pen cost? (a) ₹270 (b) not enough info (c) ₹50 (d) ₹45
23. 23.True or false: “It rained on my birthday once, so it always rains on birthdays.” gives enough evidence. (a) True (b) False
24. 24.📊 Which gives the best evidence about the class’s favourite game? (a) asking the whole class (b) asking one friend (c) asking your pet (d) guessing
25. 25.🧩 Nisha is 7 years old. Aarav is 5 years older than Nisha. How old is Aarav? (a) 5 (b) 13 (c) 12 (d) not enough info
26. 26.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) not enough evidence (b) enough evidence
27. 27.🧩 The film starts at 5 PM and lasts 2 hours. When does it end? (a) 5 PM (b) 8 PM (c) 7 PM (d) not enough info
28. 28.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
29. 29.🧩 Meera bought 4 kites for ₹120 in all. Each kite cost the same. What did one kite cost? (a) ₹120 (b) not enough info (c) ₹30 (d) ₹35
30. 30.🧩 Diya bought 5 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹100 (c) ₹25 (d) not enough info
31. 31.📝 What does “evidence” mean? (a) a loud opinion (b) facts that support it (c) a rumour (d) a guess
32. 32.🧩 A box has 3 rows of laddoos, with 7 in each row. How many laddoos are in the box? (a) 10 (b) 21 (c) 28 (d) not enough info
33. 33.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) enough evidence (b) not enough evidence
34. 34.🧩 Ananya bought 4 notebooks for ₹120 in all. Each notebook cost the same. What did one notebook cost? (a) ₹120 (b) not enough info (c) ₹35 (d) ₹30
35. 35.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
36. 36.🧩 Saanvi bought 5 mangoes for ₹100 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹100 (c) not enough info (d) ₹25
37. 37.🧩 Diya bought 2 notebooks for ₹30 in all. Each notebook cost the same. What did one notebook cost? (a) ₹15 (b) ₹20 (c) not enough info (d) ₹30
38. 38.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) True (b) False
39. 39.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 8 PM (c) 9 PM (d) 6 PM
40. 40.🔬 Why do scientists repeat an experiment? (a) to waste time (b) to change answers (c) to be sure of results (d) for fun only

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