Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 432 · 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.True or false: “One mango in the box was sour, so all the mangoes are sour.” gives enough evidence. (a) False (b) True
2. 2.📊 Which gives the best evidence about the class’s favourite game? (a) guessing (b) asking one friend (c) asking the whole class (d) asking your pet
3. 3.🥭 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) yes, mangoes match (c) no, check more (d) yes, it is certain
4. 4.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) True (b) False
5. 5.🧩 A box has 6 rows of mangoes, with 5 in each row. How many mangoes are in the box? (a) 35 (b) 11 (c) not enough info (d) 30
6. 6.📝 What does “evidence” mean? (a) a guess (b) a loud opinion (c) facts that support it (d) a rumour
7. 7.🧩 Diya bought 5 markers for ₹225 in all. Each marker cost the same. What did one marker cost? (a) ₹45 (b) not enough info (c) ₹225 (d) ₹50
8. 8.🧩 A box has 3 rows of guavas, with 7 in each row. How many guavas are in the box? (a) not enough info (b) 28 (c) 21 (d) 10
9. 9.🧩 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
10. 10.True or false: “It rained on my birthday once, so it always rains on birthdays.” does not give enough evidence. (a) False (b) True
11. 11.🧩 Kabir is 8 years old. Tara is 5 years older than Kabir. How old is Tara? (a) 14 (b) not enough info (c) 13 (d) 5
12. 12.🧩 Arjun bought 3 markers and a water bottle for ₹175 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹172 (c) ₹58 (d) ₹175
13. 13.🧩 Rohan bought 5 mangoes for ₹75 in all. Each mango cost the same. What did one mango cost? (a) ₹75 (b) ₹15 (c) not enough info (d) ₹20
14. 14.🔬 Why do scientists repeat an experiment? (a) to change answers (b) for fun only (c) to waste time (d) to be sure of results
15. 15.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) enough evidence (b) not enough evidence
16. 16.True or false: “A dog barked at me once, so all dogs are mean.” does not give enough evidence. (a) True (b) False
17. 17.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) never see dogs (c) that one dog barked (d) dogs hate you
18. 18.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) not enough evidence (b) enough evidence
19. 19.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 3 PM (d) 5 PM
20. 20.🧩 Enough evidence or not? “One student said the canteen food was cold, so it is always cold.” (a) enough evidence (b) not enough evidence
21. 21.🧩 The film starts at 6 PM and lasts 3 hours. When does it end? (a) 10 PM (b) not enough info (c) 9 PM (d) 6 PM
22. 22.🧩 Meera is 8 years old. Saanvi is 8 years older than Meera. How old is Saanvi? (a) not enough info (b) 16 (c) 17 (d) 8
23. 23.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) False (b) True
24. 24.🧩 Enough evidence or not? “We tried the new route for 10 days, and it was faster every day.” (a) enough evidence (b) not enough evidence
25. 25.🧩 Before solving a word problem, first check… (a) your handwriting (b) what facts are given (c) the page number (d) the colour of ink
26. 26.True or false: “My friend didn’t like the book, so the book is bad for everyone.” does not give enough evidence. (a) False (b) True
27. 27.🧩 The film starts at 4 PM. It is a long film. When does it end? (a) 7 PM (b) not enough info (c) 6 PM (d) 5 PM
28. 28.🧩 Nisha is 8 years old. Ananya is older than Nisha. How old is Ananya? (a) 10 (b) 13 (c) not enough info (d) 9
29. 29.🧩 Ishaan is 12 years old. Vihaan is older than Ishaan. How old is Vihaan? (a) 14 (b) 13 (c) not enough info (d) 17
30. 30.🧩 A box has 8 rows of eggs, with 4 in each row. How many eggs are in the box? (a) 12 (b) not enough info (c) 36 (d) 32
31. 31.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” gives enough evidence. (a) False (b) True
32. 32.🧩 Saanvi bought 6 notebooks for ₹60 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹15 (c) ₹60 (d) ₹10
33. 33.🧩 A box has 3 rows of eggs, with 8 in each row. How many eggs are in the box? (a) 11 (b) not enough info (c) 24 (d) 32
34. 34.🧩 Ishaan is 7 years old. Meera is 8 years older than Ishaan. How old is Meera? (a) 8 (b) 16 (c) not enough info (d) 15
35. 35.🧩 A box has 3 rows of apples, with 4 in each row. How many apples are in the box? (a) 12 (b) 16 (c) 7 (d) not enough info
36. 36.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
37. 37.🧩 A box of apples has 9 in each row. How many apples are in the box? (a) not enough info (b) 9 (c) 18 (d) 90
38. 38.🧩 Aarav bought 4 notebooks for ₹100 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹25 (c) ₹100 (d) ₹30
39. 39.🧩 Rohan bought 5 pens for ₹275 in all. Each pen cost the same. What did one pen cost? (a) ₹55 (b) ₹60 (c) not enough info (d) ₹275
40. 40.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence

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