Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 741 · 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: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
2. 2.True or false: “We checked all 40 mangoes in the box; every one was ripe.” does not give enough evidence. (a) True (b) False
3. 3.🐕 One dog barked at you. What is the fair conclusion? (a) that one dog barked (b) all dogs are mean (c) never see dogs (d) dogs hate you
4. 4.True or false: “We tried the new route for 10 days, and it was faster every day.” gives enough evidence. (a) True (b) False
5. 5.🧩 Kabir is 10 years old. Arjun is 5 years older than Kabir. How old is Arjun? (a) 15 (b) 16 (c) 5 (d) not enough info
6. 6.True or false: “We asked all 30 classmates; 25 chose the zoo trip.” does not give enough evidence. (a) True (b) False
7. 7.🧩 Rohan is 12 years old. Vihaan is older than Rohan. How old is Vihaan? (a) 17 (b) not enough info (c) 14 (d) 13
8. 8.🧩 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
9. 9.🧩 A box of eggs has 5 in each row. How many eggs are in the box? (a) 10 (b) 5 (c) 50 (d) not enough info
10. 10.🧩 Saanvi bought 2 balls for ₹110 in all. Each ball cost the same. What did one ball cost? (a) ₹110 (b) ₹55 (c) ₹60 (d) not enough info
11. 11.🧩 Rohan bought 3 balls for ₹105 in all. Each ball cost the same. What did one ball cost? (a) ₹105 (b) ₹40 (c) not enough info (d) ₹35
12. 12.🧩 Vihaan bought 6 mangoes for ₹270 in all. Each mango cost the same. What did one mango cost? (a) ₹270 (b) ₹50 (c) ₹45 (d) not enough info
13. 13.🧩 Meera is 10 years old. Tara is older than Meera. How old is Tara? (a) 11 (b) 15 (c) not enough info (d) 12
14. 14.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
15. 15.🧩 Enough evidence or not? “We measured the plant every day for a month; it grew 9 cm.” (a) enough evidence (b) not enough evidence
16. 16.🧩 Vihaan is 8 years old. Kabir is older than Vihaan. How old is Kabir? (a) 10 (b) 13 (c) not enough info (d) 9
17. 17.🥭 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) yes, mangoes match (c) no mango is sweet (d) no, check more
18. 18.🧩 Saanvi bought 3 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) ₹25 (b) ₹60 (c) not enough info (d) ₹20
19. 19.🧩 Before solving a word problem, first check… (a) what facts are given (b) the colour of ink (c) your handwriting (d) the page number
20. 20.True or false: “A dog barked at me once, so all dogs are mean.” gives enough evidence. (a) True (b) False
21. 21.🧩 Kabir bought 3 mangoes and a water bottle for ₹195 in all. Each mango cost the same. What did one mango cost? (a) ₹65 (b) ₹192 (c) ₹195 (d) not enough info
22. 22.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 5 PM (b) 3 PM (c) 4 PM (d) not enough info
23. 23.🧩 The film starts at 3 PM and lasts 3 hours. When does it end? (a) 6 PM (b) 3 PM (c) 7 PM (d) not enough info
24. 24.🧩 A box has 3 rows of oranges, with 7 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 28 (d) 21
25. 25.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
26. 26.🧩 Ananya bought 4 mangoes and a lunch box for ₹270 in all. Each mango cost the same. What did one mango cost? (a) ₹67 (b) ₹266 (c) not enough info (d) ₹270
27. 27.🧩 Aarav is 9 years old. Kabir is 4 years older than Aarav. How old is Kabir? (a) 4 (b) not enough info (c) 14 (d) 13
28. 28.🧩 A box has 4 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) 8 (b) 16 (c) not enough info (d) 20
29. 29.🧩 Meera bought 5 pens and a bag for ₹145 in all. Each pen cost the same. What did one pen cost? (a) ₹29 (b) ₹140 (c) not enough info (d) ₹145
30. 30.True or false: “One mango in the box was sour, so all the mangoes are sour.” does not give enough evidence. (a) True (b) False
31. 31.🧩 Meera bought 2 pens and a water bottle for ₹50 in all. Each pen cost the same. What did one pen cost? (a) ₹50 (b) not enough info (c) ₹48 (d) ₹25
32. 32.🧩 Meera is 12 years old. Ishaan is older than Meera. How old is Ishaan? (a) 17 (b) 13 (c) 14 (d) not enough info
33. 33.📊 Which gives the best evidence about the class’s favourite game? (a) asking one friend (b) asking your pet (c) asking the whole class (d) guessing
34. 34.🧩 A box has 7 rows of mangoes, with 4 in each row. How many mangoes are in the box? (a) not enough info (b) 28 (c) 11 (d) 32
35. 35.🧩 Kabir bought 6 markers and a water bottle for ₹300 in all. Each marker cost the same. What did one marker cost? (a) ₹300 (b) ₹294 (c) not enough info (d) ₹50
36. 36.🧩 A box of laddoos has 8 in each row. How many laddoos are in the box? (a) 8 (b) not enough info (c) 80 (d) 16
37. 37.🔬 Why do scientists repeat an experiment? (a) for fun only (b) to waste time (c) to be sure of results (d) to change answers
38. 38.🧩 Enough evidence or not? “We asked all 30 classmates; 25 chose the zoo trip.” (a) not enough evidence (b) enough evidence
39. 39.🧩 Rohan bought 4 pens and a cap for ₹250 in all. Each pen cost the same. What did one pen cost? (a) ₹62 (b) not enough info (c) ₹250 (d) ₹246
40. 40.🧩 Nisha is 11 years old. Aarav is older than Nisha. How old is Aarav? (a) 16 (b) 12 (c) not enough info (d) 13

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