Evidence and Missing Information Worksheet

Critical thinking lesson 9: Enough evidence and missing information · Set 969 · 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 8 rows of oranges, with 5 in each row. How many oranges are in the box? (a) 13 (b) 40 (c) not enough info (d) 45
2. 2.🧩 A box has 8 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 54 (b) 14 (c) not enough info (d) 48
3. 3.True or false: “We tested 20 seeds, and 18 of them sprouted.” gives enough evidence. (a) False (b) True
4. 4.📝 What does “evidence” mean? (a) facts that support it (b) a loud opinion (c) a rumour (d) a guess
5. 5.🔬 Why do scientists repeat an experiment? (a) to be sure of results (b) to waste time (c) for fun only (d) to change answers
6. 6.🧩 The film starts at 3 PM and lasts 1 hour. When does it end? (a) 4 PM (b) not enough info (c) 5 PM (d) 3 PM
7. 7.🧩 Rohan bought 5 balls and a cap for ₹340 in all. Each ball cost the same. What did one ball cost? (a) ₹68 (b) ₹335 (c) ₹340 (d) not enough info
8. 8.🧩 Diya bought 6 kites for ₹300 in all. Each kite cost the same. What did one kite cost? (a) ₹55 (b) ₹300 (c) not enough info (d) ₹50
9. 9.🧩 Before solving a word problem, first check… (a) what facts are given (b) the page number (c) the colour of ink (d) your handwriting
10. 10.True or false: “We measured the plant every day for a month; it grew 9 cm.” gives enough evidence. (a) True (b) False
11. 11.True or false: “We tried the new route for 10 days, and it was faster every day.” does not give enough evidence. (a) False (b) True
12. 12.🧩 Enough evidence or not? “One mango in the box was sour, so all the mangoes are sour.” (a) enough evidence (b) not enough evidence
13. 13.True or false: “We checked all 40 mangoes in the box; every one was ripe.” gives enough evidence. (a) False (b) True
14. 14.📊 Which gives the best evidence about the class’s favourite game? (a) asking your pet (b) guessing (c) asking one friend (d) asking the whole class
15. 15.🧩 Enough evidence or not? “We checked all 40 mangoes in the box; every one was ripe.” (a) not enough evidence (b) enough evidence
16. 16.🧩 The film starts at 4 PM and lasts 3 hours. When does it end? (a) 8 PM (b) 7 PM (c) not enough info (d) 4 PM
17. 17.🧩 Arjun is 10 years old. Aarav is 7 years older than Arjun. How old is Aarav? (a) 7 (b) 18 (c) 17 (d) not enough info
18. 18.🧩 Ishaan bought 3 notebooks and a lunch box for ₹80 in all. Each notebook cost the same. What did one notebook cost? (a) not enough info (b) ₹80 (c) ₹77 (d) ₹26
19. 19.True or false: “We measured the plant every day for a month; it grew 9 cm.” does not give enough evidence. (a) True (b) False
20. 20.🥭 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, it is certain (c) yes, mangoes match (d) no, check more
21. 21.🧩 Meera bought 5 pens for ₹75 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹15 (c) ₹75 (d) not enough info
22. 22.True or false: “We tested 20 seeds, and 18 of them sprouted.” does not give enough evidence. (a) False (b) True
23. 23.🧩 A box has 7 rows of eggs, with 9 in each row. How many eggs are in the box? (a) not enough info (b) 72 (c) 63 (d) 16
24. 24.🧩 A box has 5 rows of laddoos, with 6 in each row. How many laddoos are in the box? (a) 11 (b) 36 (c) not enough info (d) 30
25. 25.🧩 Enough evidence or not? “We tested 20 seeds, and 18 of them sprouted.” (a) not enough evidence (b) enough evidence
26. 26.🧩 A box of laddoos has 6 in each row. How many laddoos are in the box? (a) 6 (b) 12 (c) 60 (d) not enough info
27. 27.🧩 Vihaan is 6 years old. Ishaan is 4 years older than Vihaan. How old is Ishaan? (a) 4 (b) 10 (c) 11 (d) not enough info
28. 28.🧩 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
29. 29.True or false: “One student said the canteen food was cold, so it is always cold.” gives enough evidence. (a) True (b) False
30. 30.🧩 A box has 4 rows of oranges, with 6 in each row. How many oranges are in the box? (a) 10 (b) not enough info (c) 30 (d) 24
31. 31.🧩 Enough evidence or not? “A dog barked at me once, so all dogs are mean.” (a) enough evidence (b) not enough evidence
32. 32.🧩 The film starts at 6 PM and lasts 2 hours. When does it end? (a) not enough info (b) 9 PM (c) 6 PM (d) 8 PM
33. 33.🧩 Kabir is 7 years old. Vihaan is 4 years older than Kabir. How old is Vihaan? (a) not enough info (b) 11 (c) 12 (d) 4
34. 34.🧩 Enough evidence or not? “It rained on my birthday once, so it always rains on birthdays.” (a) not enough evidence (b) enough evidence
35. 35.🧩 A box of guavas has 5 in each row. How many guavas are in the box? (a) 5 (b) not enough info (c) 50 (d) 10
36. 36.🧩 Nisha bought 6 markers for ₹60 in all. Each marker cost the same. What did one marker cost? (a) not enough info (b) ₹15 (c) ₹10 (d) ₹60
37. 37.🧩 Arjun bought 3 pens for ₹45 in all. Each pen cost the same. What did one pen cost? (a) ₹20 (b) ₹15 (c) not enough info (d) ₹45
38. 38.🐕 One dog barked at you. What is the fair conclusion? (a) all dogs are mean (b) that one dog barked (c) never see dogs (d) dogs hate you
39. 39.🧩 Diya bought 3 balls and a cap for ₹185 in all. Each ball cost the same. What did one ball cost? (a) ₹182 (b) ₹61 (c) not enough info (d) ₹185
40. 40.🧩 Rohan bought 4 mangoes for ₹80 in all. Each mango cost the same. What did one mango cost? (a) ₹20 (b) ₹25 (c) not enough info (d) ₹80

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